MI5: British Security Service Operations, 1909 1945: The True Story of the Most Secret counter-espionage Organisation in the World

Protecting National Security: A History of Brit, Glover..

Inside The Enigma: British Officials In Russia, 1900-39

Codebreakers and Spies: How British Intelligence and Special Ope

Ring of Spies: How MI5 and the FBI brought down the Nazis in America HB